Menu
Close

Georgia Tech among institutions part of the Center for Sustainable Nanotechnology

Prof. Rigoberto Hernandez is part of the $20 million NSF research center focusing on the molecular mechanisms by which nanoparticles interact with biological systems

Prof. Jean-Luc Bredas Wins the ACS Award for Chemistry of Materials

A top ACS honor in materials chemistry goes to a Georgia Tech professor.

Perry Group Develops a New Capacitor Dielectric Material

Professor Perry describes this new research, "Sol-gels with organic groups are well known and fatty acids such as phosphonic acids are well known, but to the best of our knowledge, this is the first time these two types of materials have been combined into high-density energy storage devices."

GT Homecoming

Don't miss your chance to see one of the biggest games of the season, GT vs. FSU, at this year's Homecoming & Reunion Weekend. Registration is now open! Join classmates and bring your family October 22-24 for a weekend of Yellow Jacket pride.

Doctoral Candidate Daisy Bourassa Receives AAUW American Fellowship

The American Association of University Women (AAUW) awarded a 2015–16 American Fellowship to Daisy Bourassa.

Xia group publishes a new method in Science

Xia and co-workers demonstrated the fabrication of platinum nanocages with walls as thin as a few atomic layers (or below one nanometer), together with a well-defined, controllable surface structure. These nanocages exhibited greatly enhanced catalytic activity and durability toward oxygen reduction, a key reaction in the fuel cell technology.

Boggs Upper-level Chemistry and Biochemistry Labs Renovated

Form follows function and so the Gilbert Hillhouse Boggs building second floor—originally housing research labs and now home to upper-level chemistry and biochemistry teaching labs—has been renovated (pictures, courtesy of HKS, Inc., below).

Seminars & Events

Colloquium - Thursday, September 3, 2015 - 4:00pm - MoSE G011
Prof. Patrick T. Mather - Syracyse University
Special Seminar - Tuesday, September 8, 2015 - 10:00am - MoSE 3201A
Prof. Valeria Molinero - University of Utah
Physical Division Seminar - Tuesday, September 8, 2015 - 4:00pm - MoSE 3201A
Meeting - Thursday, September 10, 2015 - 11:00am - MoSE 2100F

Featured Research

Article Title
Research Authors
Justin C. Hancock, Karena W. Chapman, Gregory J. Halder, Cody R. Morelock, Benjamin S. Karlan, Leighanne C. Gallington, Angelo Bongiorno, Chu Han, Si Zhou, Angus P. Wilkinson.
Citation
Chemistry of Materials (2015), Vol. 21(11), 3912-3918
Miscellaneous Details
Georgia Institute of Technology including a President’s Undergraduate Research Award. Experiments performed at the Advanced Photon Source and ORNL's Spallation Neutron Source, both are U.S. Department of Energy (DOE) Office of Science User Facilities.

CaZrF6 and CaHfF6 display much stronger negative thermal expansion (NTE) than ZrW2O8 and other corner-shared framework structures. Their NTE is comparable to that reported for framework solids containing multiatom bridges, such as metal cyanides and metal-organic frameworks. However, they are formable as ceramics, transparent over a wide wavelength range and can be handled in air; these characteristics can be beneficial for applications. The NTE of CaZrF6 is strongly temperature-dependent, and first-principles calculations show that it is largely driven by vibrational modes below 150 cm-1. CaZrF6 is elastically soft with a bulk modulus at 300 K of 37 GPa and, upon compression, starts to disorder at approximately 400 MPa. The strong NTE of CaZrF6, which remains cubic to <10 K, contrasts with cubic CoZrF6, which only displays modest NTE above its rhombohedral to cubic phase transition at close to 270 K. CaZrF6 and CaHfF6 belong to a large and compositionally diverse family of materials, AIIBIVF6, providing for a detailed exploration of the chemical and structural factors controlling NTE and many opportunities for the design of controlled thermal expansion materials.

Map of Georgia Tech

School of Chemistry & Biochemistry

901 Atlantic Drive Atlanta, GA 30332-0400

(404) 894-4002 (phone) | (404) 894-7452 (fax)